Plug-fuse.



\ improved means for securi UNITED STATES JOHN H. HANSON, OF CHICAGO, ILLIN ASSIGNMENTS, TO STEPHEN II. LOUGIIMA OF OIIIGAO, ILLINOIS.

P L U G Patented December 1, 1903.

PATENT OFFICE.

-FUSE.

SYECIFICATION forming part of .Letters Patent No. 745,493, dated December 1, 1903- Application filed July 31,1908. Serial No. 167,721.

To all whom, it may concern:

Be it known that 1, JOHN H. HANSON, aciiizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,

have invented certain new and useful Improvements in Plug-Fuses, of which the following is a specification.

This invention, as stated, fuses, and has for its 0 relates to plugbject the provision of ng within such fuses the wire fuse commonly employed to connect the terminals of the plug. As at present constructed, the ends of the wire fuse are soldered to said terminals. Owing to 3 the low melting-point of fuse-wire and the confined space within which the work must be done, the soldering of the wire to the terminals of the plug is difficult and tedious.

The object of this invention, therefore, is to provide a plug fuse into which the fuse may be quickly and easily inserted and wherein good electrical contact between the fuse and the terminals is insured.

In the accompanying drawings, Figure 1 is a vertical central sectional view through a plug-fuse embodying the features of my invention. Fig. 2 is a detail perspective view of the contact-points and the fuse. Fig. 3 is a perspective view of the fuse, showing its go form when in place in the plug.

In the construction of a plug-fuse embodying my invention I provide an insulating-cup 1 substantially circular in horizontal cross section. A vertical partition 2 extends 5 across the interior of said cup, to one side of the vertical center thereof, for a purpose to appear later herein, and in the wall of the cup 1 adjacent to the middle point of the partition 2 is formed an opening 3. An opening 4 is provided centrally of the lower end of the cup to receive the end contact of the plug. To the outer side of the lower portion of the cup is secured a sleeve 5, exteriorly screw-threaded to engage the interior screw- 5 threads of a common attaching-socket, (not shown,) said sleeve forming the side terminal of the plug.

Abracket 6 is rigidly secured 5 in any suitable manner, as by soldering, and extends upwardlyinto the cup 1 through the opening 3 in the side thereof. The upto the sleeve (No model.)

7 of this bracket is bent with reer portion thereof and pro- 2 to a point near the plug. The outer end '7 is provided with a apted to receive per portion lation to the low jects over the partition longitudinal axis of the of this upper portion screw-threaded opening 8, ad the headed screw 9.

The end contact 10 of this plug-fuse is secured in place by means'of a stem comprising the prongs 11, fixed to said contact and extending through the opening 4 in the lower end of the cup 1, the inner ends of said prongs being clenched to retain the terminal 10 in position. Said terminal is loosely connected with the cup 1 to provide a space of varying size between the contact and the end of the cup for a purpose to appear later herein. slot 12 is cut through said terminal from the center to the periphery thereof to facilitate the insertion of the fuse, to be next described, and the inner side of said terminal is made concave for a purpose to be mentioned hereinafter.

The side terminal 5 and the end terminal 10 are connected by means of a piece of fusewire 13, one end of said wire being wrapped around the securing-prongs 11 of the terminal 10 and lying in the space between said terminal and the lower end of the cup 1. The terminal 10 is loosely connected with the cup 1 to provide a space between said terminal and the end of the cup adapted to receive fuse-wire of different sizes. The other end of the wire fuse is coiled about the screw 9, beneath the head thereof, said screw clamping thewire between said head and the bracket 3. 3y reason of the concave inner side of the terminal 10 the pressure exerted upon said terminal when the plug is being screwed into its socket tends to force the fuse-wire toward the center of said terminal, insuring good electrical contact.

A cap 14 is provided to close the open up per end of the cup 1, said cap having a screw" thread connection with the exterior of the cup.

A fuse is inserted into the plug in the following manner; The cap 1 1 being removed, a length of fuse-wire is ins upper end of the cup 1 and one end passed through the opening 4: in the lower end of erted into the open ions in Letters Patent No. 745,49".

Correct 2 teases said cup and through the radial slot 12 in the end contact 10. Said end is then coiled about the securing-prongs ll of said contact and any outwardly projecting portion cut or pinched off. The other end of the fuse-wire is now wrapped around the screw 9, beneath the head thereof, and said screw tightened down to clamp the fuse firmly in place. The partition 2 extending across the interior of the insulating-cup separates the terminals 5 and 10, thus preventing the formation of an are upon the blowing out of the fuse.

It is apparent that various changes may be made in the embodiment herein shown of this invention without departing from the spirit and scope thereof, wherefore I desire not to limit myself to the precise details herein set forth.

I claim as my invention- 1. In a plug-fuse, in combination, an insulating-cup; a side terminal for said cup; an end terminal having a stem for securing said terminal to said cup, said stem com prong adapted to be clenched to hold said terminal in position; and a Wire fuse having electrical connection side terminal and at about the stem of said said end terminal and the end of the cup.

2. In a plug-fuse, in combination, an insulating-cup; a side terminal and an end terminal for said cup, said end terminal being slotted to facilitate the insertion of a fuse; and a wire fuse having electrical connection at one end with said side terminal and havingits other end coiled between the end of said cup and said end terminal.

3. In a pl rig-fuse, in combination, an insuits other end coiled end terminal between It is hereby certified that Letters Patent N 0. 745,493 upon the application of John H. Hanson, of Chicago,

in Plug-Fuses, was erroneously issued to prising a I at one end with said lating-cup; a side terminal for said cup; an end terminal having a slot extending therethrough to facilitate the insertion of a fuse, also having a stem forsecuring said terminal to said cup; and a wire fuse having electrical connection at one end with said side terminal and at its other end coiled about the stem of said end terminal.

4. In a plug-fuse, in combination, an insulating-cup; a side terminal for said cup; an end terminal having a slot extending therethrough to facilitate the insertion of a fuse, also having a stem for securing said terminal to said cup, said stem comprising a prong adapted to be clenched to hold said terminal in position; and a wire fuse having electrical connection at one end with said side terminal and at its other end coiled about the stem of said end terminal, the inner side of said end terminal being concave to retain the end of the fuse in place.

5. In a plug-fuse, in combination, an insulating-cup; a side terminal and an end terminal for said cup; a partition in said cup extending between said side terminal and said end terminal; abracket mounted in said cup at one side of said partition and extending to the other side of said partition, said bracket having electrical connection with said side terminal; and a wire fuse having electrical connection at one end with said bracket and at its other end with said end terminal.

JOHN H. HANSON. Witnesses;

S. ii. iiononims, Gnoncn ll. Oininjintuj'n.

, granted December 1, 1903,

Illinois, for an improvement Stephen H. Loughman and Reuben Gr.

Galusha, as owners of the entire interest in said invention; that said Letters Patent should have been issued to the inventor John H. Hanson and Stephen H Loughman and Reuben G. Galnsha, jointly,

thirds interest the specification Chigao said Loughman and Galusha being only in said patent, as shown by the assignees of two-.

the record of assignments in this Was erroneously printed at the head of instead of Chicago; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 15th day of December, A. D, 1903.

[SEAL] F. I. ALLEN,

Commissioner of Patents. 

